Question
A and B can complete a work in 12 days and 15 days
respectively. If they work together for 4 days and then B leaves, in how many days can A complete the remaining work?Solution
ATQ, A's daily work = 1/12 B's daily work = 1/15 A and B together do 1/12 + 1/15 = 3/20 of the work in one day. In 4 days, they complete 4 × (3/20) = 3/5 of the work. Remaining work = [1 - (3/5)] = 2/5 A will complete the remaining work in (2/5) / (1/12) = 24/5 = 4.8 days.
If p = 24 - q - r and pq + r(q + p) = 132, then find the value of (p² + q² + r²).
((99.9 - 20.9)² + (99.9 + 20.9)² )/(99.9 x 99.9 + 20.9 x 20.9) = ?
...
Find the value of the given expression-
(4x+4 -5× 4x+2) / 15×4x – 22×4x
If 4x² + y² = 40 and x y = 6, then find the value
of 2x + y?
If p = 40 - q - r and pq + r(q + p) = 432, then find the value of (p² + q² + r²).
47.98 × 4.16 + √325 × 12.91 + ? = 79.93 × 5.91
If x + y = 4 and (1/x) + (1/y) = 24/7, then the value of (x3 + y3).
- If p = 20 - q - r and pq + r(p + q) = 154, then find the value of (p² + q² + r²).
If a = (√2 - 1)1/3, then the value of (a-1/a)3 +3(a-1/a) is:
